ISRO CSE 2018

Question 1
Consider the following program
{
    int x=1;
    printf("%d",(*char(char*)&x));
} 
Assuming required header files are included and if the machine in which this program is executed is little endian, then the output will be
A
0
B
99999999
C
1
D
unpredictable
C Programming   Array and Pointer
Question 2
Consider the following declaration :
 structaddr {
    char city[10];
    char street[30];
    int pin;
};
struct {
    char name[30];
    int gender;
    struct addr locate;
} person, *kd = &person;
Then ^{\star}(k d->\text { name }+2) can be used instead of:
A
person.name+2
B
k d->(\text { name }+2)
C
*((* k d) . \text { name }+2)
D
either (A) or(B), not (C)
C Programming   Array and Pointer
Question 3
If a variable can take only integral values from 0 to n, where n is an integer, then the variable can be represented as a bit-field whose width is (the log in the answer are to the base 2, and \lceil\log n\rceil means the floor of \log_{}{n} )
A
\left \lceil \log (n) \right \rceil + 1 \text{ bits}
B
\left \lceil \log (n-1) \right \rceil + 1 \text{ bits}
C
\left \lceil \log (n+1) \right \rceil + 1\text{ bits}
D
None of the above
Digital Logic   Number System
Question 4
The following C program:
 {
    fork(); fork(); printf("yes");
    
}
If we execute this core segment, how many times the string yes will be printed?
A
Only once
B
2 times
C
4 times
D
8 times
Operating System   System Call
Question 5
Considering the following table in a relational database :
\begin{array}{|c|c|c|c|} \hline \text { Last Name } & \text { Rank } & \text { Room } & \text { Shift } \\ \hline \text { Smith } & \text { Manager } & 234 & \text { Morning } \\ \hline \text { Jones } & \text { Custodian } & 33 & \text { Afternoon } \\ \hline \text { Smith } & \text { Custodian } & 33 & \text { Evening } \\ \hline \text { Doe } & \text { Clerical } & 222 & \text { Morning } \\ \hline \end{array}
According to the data shown in the table, which of the following could be a candidate key of the table?
A
{Last Name}
B
{Room}
C
{Shift}
D
{Room, Shift}
Database Management System   Relational Schema
Question 6
A data driven machine is one that executes an instruction if the needed data is available. The physical ordering of the code listing does not dictate the course of execution. Consider the following pseudo-code:

A. Multiply E by 0.5 to get F
B. Add A and B to get E
C. Add B with 0.5 to get D
D. Add E and F to get G
E. Add A with 10.5 to get C

Assume A,B,C are already assigned values and the desired output is G. Which of the following sequence of execution is valid?
A
B, C, D, A, E
B
C, B, E, A, D
C
A, B, C, D, E
D
E, D, C, B, A
Computer Organization   Machine Instruction
Question 7
Assume A and B are non-zero positive integers. The following code segment:
 while(A!=B){
    if(A> B)
    A -= B;
    else
    B -= A;
}
cout << A; // printing the value of A
A
Computes the LCM of two numbers
B
Divides the larger number by the smaller number
C
Computes the GCD of two numbers
D
Finds the smaller of two numbers
C Programming   Conditional Statement
Question 8
A language with string manipulation facilities uses the following operations.

head(s)- returns the first character of the string s
tails(s)- returns all but the first character of the string s
concat(s1,s2)- concatenates string s1 with s2.

The output of concat(head(s), head(tail(tail(s)))), where s is acbc is:
A
ab
B
ba
C
ac
D
aa
C Programming   Function
Question 9


In the diagram above, the inverter (NOT gate) and the AND-gates labeled 1 and 2 have delays of 9, 10 and 12 nanoseconds (ns), respectively. Wire delays are negligible. For certain values a and c, together with certain transition of b, a glitch (spurious output) is generated for a short time, after which the output assumes its correct value. The duration of glitch is:
A
7 ns
B
9 ns
C
11 ns
D
13 ns
Digital Logic   Boolean Algebra
Question 10
Which of the following comparisons between static and dynamic type checking incorrect?
A
Dynamic type checking slows down the execution
B
Dynamic type checking offers more flexibility to the programmers
C
In contrast to Static type checking, dynamic type checking may cause failure in runtime due to type errors
D
Unlike static type checking dynamic type checking is done during compilation
Compiler Design   Runtime Environment
There are 10 questions to complete.

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