BCA 101T Programming for Problem Solving using C Notes for GGSIPU BCA Sem 1

Written by Prateek Talwar, Founder, Unnati Educations · Reviewed by Ritik Rawat, B.Tech, Senior Full Stack Developer · Checked against the GGSIPU BCA first-year syllabus PDF on ipu.ac.in · Updated 12 October 2026 · Editorial policy

Scheme: GGSIPU BCA scheme of examination and first-year syllabus | Applies to: batch admitted in 2024-25 onwards | Verified against: syll4yrBCA240124.pdf and syllBCA1styr240124.pdf (ipu.ac.in)

BCA 101T Programming for Problem Solving using C at a glance: GGSIPU BCA Sem 1 credits, units and exam pattern

BCA 101T is the first programming paper of the BCA programme at GGSIPU (also called IPU), and these GGSIPU BCA Sem 1 C programming notes follow it unit by unit. It sits with six other GGSIPU BCA Semester 1 papers.

BCA 101T Programming for Problem Solving using C Notes unit-wise: 114 solved programs across 4 units

These C programming notes in English end every unit with a revision sheet, 22 two-mark answers for Question 1 and 10-mark questions for the unit section. Notes for every other BCA paper: GGSIPU BCA notes.

long long fact = 1;
for (i = 1; i <= n; i++)
    fact = fact * i;
printf("Factorial of %d = %lld\n", n, fact);

long long fact = 1;
for (i = 1; i <= n; i++)
    fact = fact * i;
printf("Factorial of %d = %lld\n", n, fact);

ceil(4.2)  = 5.0    ceil(-4.2)  = -4.0
floor(4.8) = 4.0    floor(-4.2) = -5.0

ceil(4.2)  = 5.0    ceil(-4.2)  = -4.0
floor(4.8) = 4.0    floor(-4.2) = -5.0

Call by value vs call by reference in C: excerpt from page 52 of the BCA 101T notes

#include <stdio.h>
void swapValue(int x, int y)      /* call by value */
{
    int t = x; x = y; y = t;
    printf("Inside swapValue : x = %d, y = %d\n", x, y);
}
void swapRef(int *p, int *q)      /* call by reference */
{
    int t = *p; *p = *q; *q = t;
}
int main()
{
    int a = 10, b = 20;
    swapValue(a, b);
    printf("After call by value     : a = %d, b = %d\n", a, b);
    swapRef(&a, &b);
    printf("After call by reference : a = %d, b = %d\n", a, b);
    return 0;
}

#include <stdio.h>
void swapValue(int x, int y)      /* call by value */
{
    int t = x; x = y; y = t;
    printf("Inside swapValue : x = %d, y = %d\n", x, y);
}
void swapRef(int *p, int *q)      /* call by reference */
{
    int t = *p; *p = *q; *q = t;
}
int main()
{
    int a = 10, b = 20;
    swapValue(a, b);
    printf("After call by value     : a = %d, b = %d\n", a, b);
    swapRef(&a, &b);
    printf("After call by reference : a = %d, b = %d\n", a, b);
    return 0;
}

Inside swapValue : x = 20, y = 10
After call by value     : a = 10, b = 20
After call by reference : a = 20, b = 10

Inside swapValue : x = 20, y = 10
After call by value     : a = 10, b = 20
After call by reference : a = 20, b = 10

Do the BCA 101T notes cover the full GGSIPU syllabus?

Yes. Every official BCA 101T topic has its own section in the notes.

Sources: GGSIPU BCA first-year syllabus (batch admitted 2024-25 onwards) and the GGSIPU BCA scheme of examination. Unit names on this page are the notes' own; the PDF numbers units only. Every course in GGSIPU notes is mapped to its official PDF the same way.

How to write BCA 101T answers: program-with-output two-mark answers and ten-mark answers with diagrams

A neat program with output beats a long paragraph. A ten-mark answer runs definition, syntax, flowchart or table, program with output, then a difference table. Practise this format on GGSIPU BCA important questions.

Unit 2 pointer answers need a memory box diagram (variable, address, value), and recursion needs a dry run. Unit 3: check fopen() for NULL in every file program. Unit 4: answer header-file questions as a table of function, purpose and result, and for command line arguments draw argv and use atoi().

BCA 101T exam corner: 88 two-mark answers and 43 ten-mark questions by unit

The BCA 101T notes answer 88 two-mark questions and list 43 ten-mark questions across 4 units, plus 114 programs with output.

One real question per unit:

• Unit 1: What is the difference between while and do-while? Pointer: while checks the condition first; do-while runs the body at least once and ends with a semicolon.

• Unit 2: Why is an array name called a constant pointer? Pointer: it holds the fixed base address (a equals &a[0]), so a++ is an error.

• Unit 3: What is the size of union { int i; double d; char c; }? Pointer: a union takes the size of its largest member, here a double of 8 bytes.

• Unit 4: If a program is run as ./add 5 7 9, what are argc and argv[2]? Pointer: argc is 4 and argv[2] is the string "7".

The notes carry no year tags, so these are exam-style questions, not past papers. More practice sits in the BCA 101T important questions.

Who writes and checks the BCA 101T C programming notes?

• Prateek Talwar, author and editor of these notes: Founder, Unnati Educations; Associate Company Secretary (ACS), ICSI, membership no. 58704, since 15 May 2019; B.Com, University of Delhi (School of Open Learning), 2012.

• Ritik Rawat, subject reviewer for the BCA and B.Tech notes: Senior Full Stack Developer, Unnati Educations; B.Tech.

These BCA 101T C programming IPU notes print every program with its output. Last updated 12 October 2026. The same team prepares GGSIPU important questions for every course. Read how notes are written and checked in our editorial policy.

BCA 101T and the BCA 101P C programming lab (20 practicals), plus other GGSIPU BCA Sem 1 papers

BCA 101P C programming lab notes: the paired lab (2 credits, 100 marks); the syllabus leaves the practical list to the teacher. Its notes solve 20 practicals with viva, fed by the theory units: Unit 1 gives C-1 to C-4 and A-1 to A-3, Unit 2 gives C-5 to C-8, A-4 and A-5, Unit 3 gives C-9, C-10, A-6 and A-8, and Unit 4 gives A-7, A-9 and A-10.

Other Semester 1 papers: BCA 103T Fundamentals of Information Technology, BCA 105T Web Technologies, BCA 107T Mathematical Foundation for Computer Science, BCA 141T Writing Skills, BCA 181T Bridge Course in Mathematics and BCA 191T Understanding India.

BCA 101T C programming notes FAQs

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