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Amazon written test for experience

Suresh
13/02/2017 0 0

For the below written test answer I defined with "*" at the end of the options 

NULL is

  • the same as 0 for integer
  • the same as blank for character       *
  • the same as 0 for integer and blank for character
  • the same as 0 for integer and blank for character

The basic function of ____________ is to search for files(or other units of text) that contain a pattern.

  • awk  *
  • search
  • cat
  • cmp

  What will be the output of the program?

class SSBool

{

    public static void main(String [] args)

    {

        boolean b1 = true;

        boolean b2 = false;

        boolean b3 = true;

        if ( b1 & b2 | b2 & b3 | b2 ) /* Line 8 */

            System.out.print("ok ");

        if ( b1 & b2 | b2 & b3 | b2 | b1 ) /*Line 10*/

            System.out.println("dokey");

    }

}

 

  • ok
  • dokey  *
  • No output is produced
  • Compilation error

  What does the literal “$?” mean in Shell script?

  • Exit status of the previous command executed
  • Exit status of the last command executed   *
  • Exit status of the first command executed
  • Exit status of the last command failed

  If 10 bulls can plough 20 identical fields in 3 days working 10 hours a day, then in how many days can 30 bulls plough 32 same identical fields working 8 hours a day?

  • 2  *
  • 4
  • 8
  • 10

 What will be the output of the following query? SELECT DECODE(TRANSLATE('A','1234567890','1111111111'),'1','YES', 'NO' ) from DUAL;

  • NO  *
  • YES
  • 1234567890
  • 1111111111

Table Employee has 10 records. It has a non-NULL SALARY column which is also UNIQUE. The SQL statement prints? SELECT COUNT(*) FROM Employee WHERE SALARY > ANY (SELECT SALARY FROM Employee);

  • 10
  • 9  *
  • 1
  • 0

  What is the output of the following program?

x = 3; y = 5; z = 10;

if [( $x -eq 3 ) -a ( $y -eq 5 -o  $z -eq 10 )]

then

    echo $x

else

    echo $y

fi

 

  • 1
  • 3
  • 5
  • Error  *

A train running at the speed of 60 km/hr crosses a pole in 9 seconds. What is the length of the train?

  • 120 metres
  • 180 metres
  • 324 metres
  • 150 metres  *

Predict output of the following program

 

#include

typedef struct film{

    int size;

    int pixel;

    float price;

}xyz,pqr;

 

struct film *jadu(){

    static xyz one={231,12,900.0},*p=&one;

    return p;

}

 

int main(){

    pqr *ptr;

    ptr=jadu();

    printf("%d",ptr->pixel);

    return 0;

}

 

  • 231
  • 12  *
  • 900.0
  • Compilation error

What will be the output of the following query? SELECT REPLACE(TRANSLATE(LTRIM(RTRIM('!! ATHEN !!','!'), '!'), 'AN', '*'),'','TROUBLE') FROM DUAL;

  • ATHEN
  • **ATHEN
  • ATHEN***
  • None of the above  *

 

How will you list all the files within a directory including hidden files aka (.) dot files?

  • ls –a   *
  • ls –h
  • ls –q
  • ls –t

How to make any script file executable?

  • $chmod 655 *.sh
  • $chmod 765 *.sh
  • $chmod 755 *.sh  *
  • $chmod 754 *.sh

How to find current running processes in Unix server?

  • $ ps –ef *
  • $ ds –ef
  • $ du –ef
  • $ ls –ef

Bottom of Form

 

The least significant bit of the binary number, which is equivalent to any odd decimal number is

  • 0
  • 1   *
  • 1 or 0
  • None

Which OSI layer is responsible for Encryption and Decryption?

  • A) Network Layer   *
  • A) Network Layer
  • C) Data Link Layer
  • D) Presentation Layer

Which of the following memories has the shortest access time?

  • Cache memory *
  • . Magnetic Bubble memory
  • Magnetic core memory
  • RAM

Expand the following abbreviation – USB?

  • a) Universal sequence bit
  • b) Universal serial bus *
  • c) Universal sequence byte
  • d) Unique serial bit

How many times printf() will be executed in the below mentioned program? main() { int i; for (i = 0; i < 4; i++) fork(); printf(“my pid = %d\n”, getpid()); }

  • 4
  • 8
  • 16  *
  • 32

 

 What will be the output of the below program?

 

#include

int main(){

int far *p=(int *)0X70230000;

int far *q=(int *)0XB0210000;

int near *x,near*y;

x=(int near *)p;

y=(int near *)q;

if(x==y)

printf("Both pointer are equal");

else

printf("Both pointer are not equal");

 

    return 0;

}

 

  • Both pointers are equal
  • Both pointer are not equal
  • Segmentation fault
  • Compilation error  *

What is the difference between linux file system and windows file system?

  • A) Under Linux, the various partitions are detected at boot and assigned a drive letter whereas Under windows, unless you mount a partition or a device, the system does not know of the existence of that partition or device. *
  • B) Under Windows, the various partitions are detected at boot and assigned a drive letter whereas Under Linux, unless you mount a partition or a device, the system does not know of the existence of that partition or device
  • C) Under Windows, the various partitions are detected at reboot and assigned a drive letter whereas Under Linux, unless you mount a partition or a device, the system does not know of the existence of that partition or device
  • D) Under Windows, the various partitions are detected at reboot and assigned a drive letter whereas Under Linux, you mount a partition or a deviceBottom of Form

A bitwise operation 'f' has an interesting characteristic, such that, if f(a,b) = c, it always turns out to be the case that f(b,a) = c; f(a,c) = b; f(c,a) = b; f(b,c) = a; f(c,b) = a.

  1. a) Which of these functions could 'f' possibly be?
  • f(a,b) = a XOR b  *
  • f(a,b) = a + b
  • f(a,b) = a - b
  • f(a,b) = a * b

the following crontab file entry

0 17 * * 1,2,3,4,5 /usr/sbin/ckbupscd >/dev/console 2>1

The above entry says to run /usr.. at what time

  • 17 mins pass midnight
  • 5 pm on weekday of each month *
  • Midnight on the 17 day of each month
  • On the 17 day of each month at 1,2,3,4 and 5 pm

 

 How would you sort a file called shopping on column 3?

  • A) Sort –n 3 shopping
  • B) Sort –K 3 shopping *
  • C) Sort –c 3 shopping 
  • D) Sort –c3 shopping

What is the output of following program?

 

#include

void print(int n, int j)

{

   if (j >= n)

      return;

   if (n-j > 0 && n-j >= j)

       printf("%d %d\n", j, n-j);

   print(n, j+1);

}

 int main()

{

    int n = 8;

    print(n, 1);

}

 

  • 1 7 2 6 3 5 4 4 4 4   *
  • 1 7 2 6 3 5 4 4
  • 1 7 2 6 3 5
  • 1 2 3 4 5 6 7 8

 What is 2NF in normalization?

  • A) if the domain of each attribute contains only atomic (indivisible) values, and the value of each attribute contains only a single value from that domain.[
  • if all the attributes in a table are determined only by the candidate keys of that table and not by any non-prime attributes
  • If no non-prime attribute is dependent on any proper subset of any candidate key of the table  *
  • D) None of above

A train running at the speed of 60 km/hr crosses a pole in 9 seconds. What is the length of the train?

  • 120 metres
  • 180 metres
  • 324 metres
  • 150 metres  *

 Predict the output of the following program

 

#include

usingnamespacestd;

intmain()

{

    constchar* p = "12345";

    constchar**q = &p;

    *q = "abcde";

    constchar*s = ++p;

    p = "XYZWVU";

    cout << *++s;

    return0;

}

 

  • a
  • c
  • b
  • D) Garbage value  *

 Predict output of the following program

 

#include

using namespace std;

class Test

{

protected:

    int x;

public:

    Test (int i):x(i) { }

    void fun() const  { cout << "fun() const " << endl; }

    void fun()        { cout << "fun() " << endl;     }

};

 

int main()

{

    Test t1 (10);

    const Test t2 (20);

    t1.fun();

    t2.fun();

    return 0;

}

 

  • Compilation error
  • fun() fun()
  • fun() const fun()
  • fun() fun() const  *

 

   What does the following query find?

 

(SELECT DISTINCT r.sid

FROM boats b, reserves r

WHERE b.bid = r.bid

AND b.color = 'red')

MINUS

 (SELECT DISTINCT r.sid

FROM boats b, reserves r

WHERE b.bid = r.bid

AND b.color = 'green');

 

  • Find the sailor IDs of all sailors who have reserved red boats but not green boats
  • Find the sailor IDs of atleast one sailor who have reserved red boats but not green boats  *
  • Find the sailor IDs of at most one sailor who have reserved red boats but not green boats
  • None of the above

 

 

 Size of IPv6 address is

  • 4 bytes
  • 8 bytes
  • 6 bytes
  • 16 bytes  *

What is the probability of getting a sum 9 from two throws of a dice?

  • 1/6
  • 1/8
  • 1/9  *
  • 1/12

What will be output of following program?

 

#include

int main(){

static int a=25;

void cdecl conv1() ;

void pascal conv2();

conv1(a);

conv2(a);

return 0;

}

void cdecl conv1(int a,int b){

printf("%d %d",a,b);

}

void pascal conv2(int a,int b){

printf("\n%d %d",a,b);

}

 

  • 25 0 0 25
  • 25 25
  • Error will occur   *
  • 25 -99999999 -99999999 25

Which command puts a script to sleep untill a signal is received?

  • sleep
  • suspend   *
  • disown
  • break

 

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