WB JECA MCA 2025 Previous Year Questions (PYQs) – Page 1 of 10
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Which of the following types of memory is non-volatile?
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Solution
EPROM is non-volatile memory; it retains data even after power is off.
Which of the following statements about RAM is correct?
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Solution
RAM is volatile memory used for temporary storage during program execution.
Which of the following best distinguishes a sequential circuit from a combinational circuit?
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Solution
Sequential circuits depend on both current inputs and past states (memory), unlike combinational circuits.
A system has a 16-bit data bus and a 20-bit address bus. What is the maximum amount of data (in bytes) the system can directly address in memory?
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Solution
Address bus = 20 bits → $2^{20}$ addresses → 1 MB memory.
Which of the following is not a type of computer code?
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Solution
EDIC is not a valid code; others are standard encoding schemes.
What will be output of the following code snippet? { float x = 5; if(x > 10) printf("Greater"); else if(x = 10) printf("Equal"); else printf("Smaller"); return 0; }
#include
int main()
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Solution
Assignment x=10 makes condition true → prints "Equal".
What will be output of the following code snippet? { int i; for (i=1;i<=5;i++) { if(i == i) continue; printf("%d ", i); } return 0; }
#include
int main()
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Solution
Condition i==i always true → continue always → nothing printed.
Which of the following statements about arrays in C is correct?
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Solution
Array name gives base address; indexing starts from 0.
Read the following statements about functions in C and choose the correct option:
(i) A function in C can return only one value directly.
(ii) Function names can be the same as variable names in the same scope.
(iii) A function must always take at least one argument.
(iv) Recursion is allowed in C functions.
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Solution
(i) true, (ii) false, (iii) false, (iv) true.
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