DSSSB TGT CS 2023 Shift 2 – Question 160

\(What is the expected output of the following Python code?

print("\nDictionary Iteration")
d = dict()
d['lmn'] = 123
d['abc'] = 345
for i in d :
    print("%s %d" %(i, d[i]))

\)

• Dictionary Iteration
  lmn 123
  abc 345
• Dictionary Iteration’
  123 lmn
  abc 345
• Dictionary Iteration’
  123 lmn
  345 abc
• Dictionary Iteration’
  lmn 345
  abc 123

\(Step-by-step execution of the Python script:
1. `print(“\nDictionary Iteration”)` prints a newline followed by `Dictionary Iteration`.
2. An empty dictionary `d` is initialized.
3. Key-value pairs are added: first `’lmn’: 123`, then `’abc’: 345`. In Python 3.7+, dictionary insertion order is strictly preserved.
4. The loop `for i in d:` iterates through the dictionary keys in insertion order:
– 1st iteration: `i = ‘lmn’`, `d[i] = 123` → prints `lmn 123`
– 2nd iteration: `i = ‘abc’`, `d[i] = 345` → prints `abc 345`
Thus, the complete printed output matches Option 1.\)