CBSE 2026 · Central · Set 4 · Q29 · 3 marks

(a)OR(b)

Write a Python function that counts and returns the number of digits appearing in the text file "Space.txt". For example, if the file contains : Space exploration has unlocked incredible advancements in technology and science. Since the first moon landing in $\displaystyle 1969$, space agencies have sent probes to Mars, Jupiter and beyond. The ISS, orbiting Earth at about $\displaystyle 400$ km, serves as a hub for research. With missions planned for $\displaystyle 2030$, humanity's cosmic journey continues! Then the function should return 11.

    def CountDigits():
        with open("Space.txt",'r') as F:
            Data=F.read()
            C=0​
            for CH in Data:
                if CH.isdigit(): # OR if CH in '0123456789'
                    C+=1         # OR if CH >= '0' and CH <= '9'
            return C
    def CountDigits():
        F = open("Space.txt")
        All=F.readlines()
        C=0
        for Line in All:
                for CH in Line:
                    if CH.isdigit(): # OR if CH in '0123456789'
                    C+=1             # OR if CH >= '0' and CH <= '9'
        F.close()

def showWords():
    with open("Space.txt",'r') as F:
        All=F.read()
        Words=All.split()
        for word in Words:
            if word.count('e')>=2:
                print(word, end=' ')
OR
def showWords():
    F = open("Space.txt")            #'r'/ 'rt' is optional
    All=F.readlines()
    for L in All:
        Words=L.split()
        for Word in Words :
            C=Word.count('e')
            if C>=2:
                print(Word, end= ' ')
    F.close()

CBSE Class 12 Computer Science past-paper question from the 2026board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.