Functions / Methods MCQs

Topic-wise practice questions for Programming (C++ / Java / Python). Test your knowledge, check solutions on demand, and pace your preparation.

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Q1hard

Why will the following recursive function crash for sum(3)?


int sum(int n) {
    return n + sum(n - 1);
}

Q2easy

What is the output of this Python-like snippet?


def multiply(a, b):
    return a * b
print(multiply(b=3, a=2))

Q3medium

Trace the value of n in this "Pass-by-Value" example:


void doubleVal(int x) {
    x = x * 2;
}
int n = 10;
doubleVal(n);
print(n);

Q4easy

What is the output?


int x = 10;
void update() {
    x = 20;
}
update();
print(x);

Q5hard

Trace the value of result:


int calculate(int a, int b = 5) {
    return a + b;
}
int result = calculate(10);

Q6medium

What will be printed?


int x = 50;
void doSomething() {
    int x = 100;
}
doSomething();
print(x);

Q7medium

(Code-Tracing / Java Logic) What is the output of this snippet?


void changeList(List list) {
    list.add("B");
}
List myL = new ArrayList();
myL.add("A");
changeList(myL);
print(myL.size());

Q8easy

What does the void keyword indicate in a function signature?

Q9easy

In modern languages, what is a "Lambda" function?

Q10medium

A developer wants to return two different values (a result and an error code) from a single function in C++. What is the best modern approach?