Question 1easymultiple choice
Full question →- A
ValueError
Why wrong: No conversion issue.
- B
SyntaxError
Why wrong: Syntax is valid.
- C
TypeError
Multiplying int and str causes TypeError.
- D
NameError
Why wrong: Variables are defined.
Question 51 of 510
PCEP Computer Programming and Python Fundamentals Practice Question
This PCEP practice question tests your understanding of computer programming and python fundamentals. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A developer writes code to calculate the area of a rectangle and prints it. The code is: length = 10 width = 5 area = length * width
print('The area is', area)If the width is accidentally assigned a string '5', what error will occur?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
TypeError
Option A is correct because multiplying an integer by a string results in a TypeError. Option B is wrong because NameError occurs only when a variable is not defined. Option C is wrong because SyntaxError occurs for invalid syntax. Option D is wrong because ValueError occurs for invalid value conversion.
Key principle: OSPF neighbour adjacency depends on matching area, hello/dead timers, network type, and authentication — IP reachability alone is not enough.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
ValueError
Why it's wrong here
No conversion issue.
- ✗
SyntaxError
Why it's wrong here
Syntax is valid.
- ✓
TypeError
Why this is correct
Multiplying int and str causes TypeError.
Related concept
OSPF neighbours must agree on key parameters.
- ✗
NameError
Why it's wrong here
Variables are defined.
Common exam traps
Common exam trap: OSPF can fail even when IP connectivity looks correct
OSPF neighbour formation depends on matching areas, timers, network type, authentication and passive-interface behaviour. Do not choose an answer only because the devices can ping.
Detailed technical explanation
How to think about this question
OSPF questions usually test the details that control adjacency and route selection. Read the neighbour state, area, router ID and interface configuration before deciding what is wrong.
KKey Concepts to Remember
- OSPF neighbours must agree on key parameters.
- Router ID selection can affect neighbour relationships and LSDB output.
- OSPF cost influences the preferred path.
- A route can appear in OSPF information but not become the installed route.
TExam Day Tips
- Check area mismatch first when OSPF adjacency fails.
- Review passive interfaces when a network is advertised but no neighbour forms.
- Use show ip ospf neighbor and show ip route clues carefully.
Key takeaway
OSPF neighbour adjacency depends on matching area, hello/dead timers, network type, and authentication — IP reachability alone is not enough.
Real-world example
How this comes up in practice
A practitioner preparing for the PCEP exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. OSPF neighbour adjacency depends on matching area, hello/dead timers, network type, and authentication — IP reachability alone is not enough. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
Review OSPF neighbour requirements — matching area type, hello and dead timers, network type, stub flags, and authentication. Study show ip ospf neighbor states (INIT, 2-WAY, FULL). Then practise related PCEP OSPF questions on adjacency and route selection.
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FAQ
Questions learners often ask
What does this PCEP question test?
Computer Programming and Python Fundamentals — This question tests Computer Programming and Python Fundamentals — OSPF neighbours must agree on key parameters..
What is the correct answer to this question?
The correct answer is: TypeError — Option A is correct because multiplying an integer by a string results in a TypeError. Option B is wrong because NameError occurs only when a variable is not defined. Option C is wrong because SyntaxError occurs for invalid syntax. Option D is wrong because ValueError occurs for invalid value conversion.
What should I do if I get this PCEP question wrong?
Review OSPF neighbour requirements — matching area type, hello and dead timers, network type, stub flags, and authentication. Study show ip ospf neighbor states (INIT, 2-WAY, FULL). Then practise related PCEP OSPF questions on adjacency and route selection.
What is the key concept behind this question?
OSPF neighbours must agree on key parameters.
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Last reviewed: Jun 24, 2026
This PCEP practice question is part of Courseiva's free Python Institute certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the PCEP exam.
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